Gripper for printing presses



Feb. 5; 1924.

A. W. WARSEN GRIPPER FOR PRINTING PRESSES Filed March 11. 1922 5 E F7 [2 M Ma ml!!! w/messas l/VI/EA/TQR' I Z flzz wsl WWarsm A TTMEEYS rarer AUGUST W. WARSEN. OF BROOKLYN, NEW YORK.

GRIPPER FOR PRINTING PRESSES.

Application filed March 11, 1922. Serial No. 542,837.

To all whom z't may concern:

Be it known that I, AUGUST WV. IVARsnN, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Gripper for Printing Presses, of which the following is a full, clear, and exact description.

This invention relates to attachments for printing presses and particularly to an improved gripper and has for an object to pro- "vide a construction wherein there will be a satisfactory gripping action by each finger at all times.

Another object in vie-w is to provide a gripping structure for printing presses wherein each finger is given a resilient gripping action independently.

A still further object is to provide a gripping structure for printing presses operable in the usual manner but arranged with spring members acting on the gripping fingers to cause a proper gripping actlon even though some of the fingers are slightly arranged out of line.

In the accompanying drawing Figure 1 is afragmentary sectional view through part of a cylinder and gripping mechanism, said gripping mechanism being constructed according to the present invention.

Figure 2 is a fragmentary sectional view through Figure 1 on line 22.

Figure 3 is a view similar to the gripping mechanism shown in Figure 1, but disclosing a slight modified construction.

Figure 4 is a top plan View of the gripping structure shown in Figure 3 with the nger removed and the retaining rod shown in section.

Figure 5 is a top plan view of the finger shown in Figure 3.

Referring to the accompanying drawing by numerals, 1 indicates the drum of a printing press, said drum being of the usual kind provided with openings 2 through which the various fingers 3 are adapted to extend so as to grip the paper 4:. Heretofore, this construction had been made as just described but the fingers were all rigidly connected to a bar 5 which bar was rocked to cause the fingers to grip or release the paper 4:. In the construction heretofore used, it was necessary that all the fingers be adjusted very accuratelyon bar 5 in order that the various fingers would all grip at the same time. Where only one finger was used on each end of the paper it was absolutely necessary that the fingers be accurately adjusted as otherwise the paper would be gripped on one side and not on the other. This accurate adjustment of the fingers is very difficult to accomplish and requires some considerable time to carry out.

In the present invention, the finger 3 at the inner end is especially constructed so as to obviate the necessity of this absolute accurate adjustment. As indicated in the drawing, the finger 3 is pivoted on a suitable pivotal member 6. The rear section 7 is provided with an aperture 8 slightly larger than the bolt 9 whereby there is a slight loose motion. A spring 10 surrounds the upper part of bolt 9 and presses against the section 7 for holding the same elevated. As indicated in Figure 1, the spring 10 also presses against an adjustable tubular member 11 screwed into the block 12 which block is clamped rigidly to the shaft 5. The bolt 9 is threaded into the sleeve 11 and is also looked against movement by a suitable lock nut 13. This bolt may be adjusted to cause a greater or less movement of the spring 10 though ordinarily only a slight movement is necessary. By providing this construction the gripping fingers may be adjusted easily and all caused to operate properly even though absolute action is not secured. Thus the spring 10 obviates the necessity of this absolute accurate adjustment and assures at all times a pro-per gripping action.

In Figures 3 to 5 will be seen a slight modified construction in which the finger 3 is provided with an aperture 1 L appreciably larger than the bolt 9 so that an appreciable movement may be given the finger 3 which finger is provided with a journal or fulcrum end 15 fitting in the socket 16 in the block 17 which block is rigidly secured to the shaft 5. Spring 10' is arranged erteriorly of the block 7 but acts in the same manner, namely, to give the gripping end of the finger a proper gripping action.

By the construction set forth, will be noted that a spring is provided to give a resilient and yielding action to the gripping fingers so that an absolutely accurate adjustment thereof will not be necessary while an eflicient gripping action will be produced. It will also be noted that an adjusting sleeve is provided which may be used for varying the tension of a spring provided for giving resilient action to the fingers.

What I claim is 1. In a gripper mechanism for printing presses, a gripper finger, a rockable block pivotally mounting said gripper finger and formed with a threaded opening, a tubular member threaded in said opening, and a bolt passing through the bore of said tubular member and through an opening in said finger for limiting the pivotal movement of said finger.

2. In a gripper mechanism for printing presses a gripper finger, a rookable block mounting said gripper finger, said rockable block presenting a vertically extending threaded opening, a tubular member threaded exteriorly arranged in said opening, said finger also presenting an opening alinable with the bore of said tubular member, a bolt extending through said opening in the finger and the bore of said tubular member, and a spring surrounding a portion of said bolt for resiliently urging the finger in one direction.

3. In a gripper mechanism for printing presses a gripper finger, a rockable block pivotally mounting said gripper finger, said block and finger presenting alinable openings, the opening in the block being threaded and a threaded member arranged in said threaded openings, together with springactuated means passing through the opening in said finger and coacting with said threaded member for resiliently urging said finger in one direction and limiting the movement thereof.

AUGUST W. WAR-SEN. 

